Move src/tools/isolate to src/tools/swarm_client as a DEPS.

tools/isolate/shard_test_cases.py

-#!/usr/bin/env python
-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Runs a google-test shard.
-
-This makes a simple interface to run a shard on the command line independent of
-the interpreter, e.g. cmd.exe vs bash.
-"""
-
-import optparse
-import os
-import subprocess
-import sys
-
-
-def fix_python_path(cmd):
-  """Returns the fixed command line to call the right python executable."""
-  out = cmd[:]
-  if out[0] == 'python':
-    out[0] = sys.executable
-  elif out[0].endswith('.py'):
-    out.insert(0, sys.executable)
-  return out
-
-
-def main():
-  parser = optparse.OptionParser(usage='%prog <options> [gtest]')
-  parser.disable_interspersed_args()
-  parser.add_option(
-      '-I', '--index',
-      type='int',
-      default=os.environ.get('GTEST_SHARD_INDEX'),
-      help='Shard index to run')
-  parser.add_option(
-      '-S', '--shards',
-      type='int',
-      default=os.environ.get('GTEST_TOTAL_SHARDS'),
-      help='Total number of shards to calculate from the --index to run')
-  options, args = parser.parse_args()
-  env = os.environ.copy()
-  env['GTEST_TOTAL_SHARDS'] = str(options.shards)
-  env['GTEST_SHARD_INDEX'] = str(options.index)
-  return subprocess.call(fix_python_path(args), env=env)
-
-
-if __name__ == '__main__':
-  sys.exit(main())